On Sat, Dec 6, 2008 at 12:29 PM, Bill Stevenson <[EMAIL PROTECTED]> wrote:
> Johnathan, could you tell me the detailed configurations of your setup, for > example, which demo files were you using, what were the arguments you used > for your transmission? I also hope the data I got is useful for your > development. Thank you!!! The likely culprit here is the default values of the frequency/phase tracking loop and bit timing recovery gain parameters. There really isn't a one size fits all value for these. These are configured on the command line of benchmark_rx.py: --costas-alpha=xxx --gain-mu=xxx Try setting the first to 0.05 and the second to 0.001 as a starting point; these are what I use successfully with otherwise default parameters. Unfortunately, tweaking these is a trial and error process; the correct values depend on your USRP crystal stability, receiver signal to noise ratio, and samples per symbol value. -Johnathan _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
